RSV, wont eat

I took my baby to the urgent Care over the weekend and he tested positive for RSV. He was born Aug 4. He is rough but I think he's not bad enough to be in the hospital, other than I can't hardly get him go eat. The nurse practitioner told me he didn't seem dehydrated to her (they didn't have the ability to check at their location) and to just keep giving Pedialyte and nursing. He wont nurse more than a couple minutes and he's refusing bottles. The most luck I've had is getting him to drink out of a water bottle filled with either breastmilk or Pedialyte though. Any ideas how to keep him better Hydrated?